This is the greatest invention for coating nail knots. You can make a perfect symmetrical bead with a matchstick, then hit it with the UV light, I have the light on and the second it is the correct shape slip it into the beam, and presto it is set, then either give a couple minutes more to complete the job or leave in the sun a couple minutes. Soooo much better than 5 minute where you have to keep on it until it sets. I bought the kit with all three glues, and have used the others for repairing household things.